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(No Model.)

A, DEGHER.

ROTARY ENGINE. No. 297,575. Patented Apr. 29, 1884.

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ADOLF DECHER, OF MUNICH, GERMANY.

ROTARY ENGINE.

SPECIFICATION forming part of Letters Patent No. 297,575, dated April 29, 1884.

Application filed October 11, 1883. (No model.) Patented in France August 31, 1883, No. 144,929.

To all whom t may concern:

Be it known that I, ADoLF DECKER, a citizen of the German Empire, residing at Munich, in the German Empire, have invented certain new and useful Improvements in Rotary Engines, (for which I have obtained Letters Patent in France, No. 144,929, under date of August 31, 1883,) and I do hereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

The invention has for its object to simplify the construction and increase the efficiency of rotary engines, as hereinafter more fully described, and as shown in the accompanying drawings, in whichv Figure l is a vertical transverse section; Fig. 2, a like horizontal section; and Fig. 3 is a section through the valve-box.

Like letters of reference indicate like parts wherever such may occur in the above figures of drawings.

The engine is composed, essentially, of a cylinder, A, closed at both ends by heads A A2, the former being constructed to form a chamber on casing, a', that contains the valve h, the cover a of said chamber being provided with a stuffing-box, a2. The cylinder A is divided into two chambers, C G', by a partition, H; and a shaft, B, located centrally in the cylinder A, stepped at one end in the head A`-, passes through the partition H, the head A', valve-casing a', its cover c, and the stuffing-box c2, and carries 'at its opposite end a belt or other Idriving pulley or wheel. The shaft B carries four wings or blades, D D and D D, projecting therefrom radially, their outer faces or edges being in close contact with the cylinder-walls. These blades or wings D D are arranged in pairs upon the shaft, one pair, D, being located in the upper and the other, D, in the lower cylinder-chamber, and at right angles to .each other, as plainly shown in Figs. l and 2, and their inclination is about ninety degrees. The cylinder-walls are provided with recesses for the reception of segmental regulating or controlling wings or blades E, located on opposite sides of said cylinder, as shown in Fig. 2, and lit steamtight to the cylinder-head A, and occupy' about one hundred and eighty degrees of the circle of the cylinder-that is to say, they are formed of segments having a radius of about ninety degrees. Each of these wings or blades coincides with a steam-port, b. The steam admitted through the ports b acts first upon the wings or blades E, which cause the wings D and shaft B to rotate; then the steam acts directly upon a portion of the said wings D, and, after having performed its work, passes out of the cylinder through the exhaust-pipes cl. The alternate admission of steam to the two compartments, C C', is so regulated as to act during one-quarter of a revolution of the shaft only, and twice during each entire revolution. By means of this arrangement steam is admitted to and exhausted from the cylinder at each quarter-revolution of the shaft B, and the function of the operative devices is completed reciprocally. The valve h is composed of two segments connected by arms with a sleeve, h', secured to the shaft B, and rotates with it. The segments of the valve, having a radius of ninety degrees, occupy each onefourth of the interior space of the valve box or casing a', and alternately open and close the steam-ports b', through which and the connecting-pipes g andthe steam-ports b the steam passes into the chambers C Cduring the operation of the regulating-wings E, the steam being cut off as soon as said wings cease to act.

It will be apparent that, instead of steam, any other suitable motive power maybe employed to drive the engine-such, for instance, as a gas or liquid.

Having thus described my invention, what I claim, and desire to secure by Letters Patent of the United States, is-

In a rotary engine, the combination of a working-cylinder divided into two chambers by a horizontal partition, each chamber having two abutment-valves, E E, and steam inlet and outlet ports b g, with a shaft, B, provided vvith two piston-wings, D, for each chamber, a rotary valve, h, rigidly connected with shaft B, and operating in a valve-chest formed IOO on one of lche heads of the cylinder, and Sut- I have hereunto set my hand this 13th day of ableeonueetionsbetweensad Va1ve ,thesour'ce August, 1883. of steam-supp1y,a11d the cylinder-chambers, I and connections to exhaust the spent steam 5 from said chambers, said parts being conl structed for cooperation substantially as del Vtnesses: scribed. LOUIS COUSSAINT,

ADOLF DECHER.

In testimony that I cla-im the foregoing I l FREDERIC MATRAY. 

